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	<div id="winchm_template_button"><A href="_dp___ntsdexts_dp_.htm" title="Previous topic"><img id="winchm_template_prev" alt="Previous topic" src="../template2/btn_prev_n.gif" border="0"></a><A href="_dt.htm" title="Next topic"><img id="winchm_template_next" alt="Next topic" src="../template2/btn_next_n.gif" border="0"></a></div>
	<div id="winchm_template_navigation">Help &gt; 
<A href="introduction6.htm">Debugging Tools for Windows (WinDbg, KD, CDB, NTSD)</A> &gt; <A href="debugger_reference.htm">Debugger Reference</A> &gt; <A href="debugger_commands.htm">Debugger Commands</A> &gt; <A href="user_mode_extensions.htm">User-Mode Extension Commands</A> &gt; </div>
	<div id="winchm_template_title">!dreg</div>
</div>
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	<div id="winchm_template_content"><div id="mainSection"><p>The <b>!dreg</b> extension displays registry information.</p>
<p></p>
<pre class="syntax"><b>!dreg </b>[<b>-d</b>|<b>-w</b>]<b> </b><i>KeyPath</i>[!<i>Value</i>] 
<b>!dreg</b></pre>
<h2><a id="ddk__dreg_dbg"></a><a id="DDK__DREG_DBG"></a>Parameters</h2>
<p></p>
<dl>
<dt><a id="_______-d______"></a><a id="_______-D______"></a>       <b>-d</b>      </dt>
<dd>
<p>Causes binary values to be displayed as DWORDs.</p>
</dd>
<dt><a id="_______-w______"></a><a id="_______-W______"></a>       <b>-w</b>      </dt>
<dd>
<p>Causes binary values to be displayed as WORDs.</p>
</dd>
<dt><a id="_______KeyPath______"></a><a id="_______keypath______"></a><a id="_______KEYPATH______"></a>       <i>KeyPath</i>      </dt>
<dd>
<p>Specifies the registry key path. It can begin with any of the following abbreviations:</p>
<p></p>
<dl>
<dt><a id="hklm"></a><a id="HKLM"></a><b>hklm</b></dt>
<dd>
<p>HKEY_LOCAL_MACHINE</p>
</dd>
<dt><a id="hkcu"></a><a id="HKCU"></a><b>hkcu</b></dt>
<dd>
<p>HKEY_CURRENT_USER</p>
</dd>
<dt><a id="hkcr"></a><a id="HKCR"></a><b>hkcr</b></dt>
<dd>
<p>HKEY_CLASSES_ROOT</p>
</dd>
<dt><a id="hku"></a><a id="HKU"></a><b>hku</b></dt>
<dd>
<p>HKEY_USERS</p>
</dd>
</dl>
<p>If no abbreviation is used, HKEY_LOCAL_MACHINE is assumed. </p>
</dd>
<dt><a id="_______Value______"></a><a id="_______value______"></a><a id="_______VALUE______"></a>       <i>Value</i>      </dt>
<dd>
<p>Specifies the name of the registry value to be displayed. If an asterisk (*) is used, all values are displayed. If <i>Value</i> is omitted, all subkeys are displayed.</p>
</dd>
</dl>
<h3><a id="DLL"></a><a id="dll"></a>DLL</h3>
<table>
<tr>
<td>
<p><b>Windows 2000</b></p>
</td>
<td>
<p>
          Ntsdexts.dll
         </p>
</td>
</tr>
<tr>
<td>
<p><b>
          Windows XP and later</b></p>
</td>
<td>
<p>
          Ntsdexts.dll
         </p>
</td>
</tr>
</table>
<p> </p>
<h3><a id="Additional_Information"></a><a id="additional_information"></a><a id="ADDITIONAL_INFORMATION"></a>Additional Information</h3>
<p>For information about the registry, see the Windows Driver Kit (WDK) documentation and <i>Microsoft Windows Internals</i> by Mark Russinovich and David Solomon. (These resources may not be available in some languages 

and countries.)</p>
<h2>Remarks</h2>
<p>The <b>!dreg</b> extension can be used to display the registry during user-mode debugging.  </p>
<p>It is most useful during remote debugging, as it allows you to browse the registry of the remote machine. It is also useful when controlling the user-mode debugger from the kernel debugger, because you cannot run a standard registry editor on the target machine when it is frozen. (You can use the <a href="#Bookmark2184"><b>.sleep</b></a> command for this purpose as well. See <a href="#Bookmark1312">Controlling the User-Mode Debugger from the Kernel Debugger</a> for details.)</p>
<p>It is also useful when debugging locally, as the information is presented in an easily readable format.</p>
<p>If <b>!dreg</b> is used during kernel-mode debugging, the results shown will be for the host computer, and not the target computer.  To display raw registry information for the target computer, use the <a href="#Bookmark2426"><b>!reg</b></a> extension instead.</p>
<p></p>
<p>Here are some examples. The following will display all subkeys of the specified registry key:</p>
<pre class="syntax" xml:space="preserve"><code>!dreg hkcu\Software\Microsoft</code></pre>
<p>The following will display all values in the specified registry key:</p>
<pre class="syntax" xml:space="preserve"><code>!dreg System\CurrentControlSet\Services\Tcpip!*</code></pre>
<p>The following will display the value Start in the specified registry key:</p>
<pre class="syntax" xml:space="preserve"><code>!dreg System\CurrentControlSet\Services\Tcpip!Start</code></pre>
<p>Typing <b>!dreg</b> without any arguments will display some brief Help text for this extension in the Debugger Command window.</p></div></div>	
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